Language Based Database URL and Routing

Question

I have URLs in the following form:

http://example.com/[language_code]/xxx

I need to do:
1. Based on the language code, I want to select the appropriate DB or raise Http 404 if the language code is not supported.
2. I would like to save the language code in the request object, so I can access it in my templates.
3. I would like my urls.py to look different:

url(r'^(?P<lang>\w+)/xxx/$', 'my_app.views.xxx')

but rather:

url(r'^xxx/$', 'my_app.views.xxx')

therefore django completely ignores the language code in the url.

Can someone tell me please if this is doable with django or should I look for another solution?

Answer 1

. : https://docs.djangoproject.com/en/dev/topics/i18n/translation/

@1 - http://djangosnippets.org/snippets/2037/ ( MIDDLEWARE_CLASSES )

import threading
from django.http import Http404
from django.conf import settings

request_cfg = threading.local()


class RouterMiddleware(object):
    def process_view(self, request, view_func, view_args, view_kwargs):
        lang = request.LANGUAGE_CODE
        if lang in settings.LANGUAGES:
            request_cfg.lang = lang
        else:
            raise Http404()

    def process_response(self, request, response):
        if hasattr(request_cfg, 'lang'):
            del request_cfg.lang
        return response


class DatabaseRouter(object):
    def _default_db(self):
        if hasattr(request_cfg, 'lang') and request_cfg.lang in settings.DATABASES:
            return request_cfg.lang
        else:
            return 'default'

    def db_for_read(self, model, **hints):
        return self._default_db()

    def db_for_write(self, model, **hints):
        return self._default_db()

@2 - request.LANGUAGE_CODE

@3 - : https://docs.djangoproject.com/en/dev/topics/i18n/translation/#internationalization-in-url-patterns